I can't crawl

Anna can army scoot with the best of them. But she hasn't mastered (or really attempted) "real" crawling. I think she got so fast at the army crawl that she doesn't see the use of other forms of crawling. Imagine our surprise this morning when we looked over a few moments ago to see this. The bottom of the coffee table is 3-4 inches of the ground. Apparently it is perfect for crawling over. She is starting to eye the stairs. I'm scared.